Sledge hammer



Dec- 1930. F. SCHWEIGERT 1,734,683

SLEDGE HAMMER Filed May 6, 1929 IN VEN TOR ATTORNEY Patented Dec. 9, 1930 FREDERICK SCHWEIGERT, or NEwYoRK, 1v. Y.

SLEDGE HAMMER Application filed May 6, 1929. Serial No. 360,701.

This invention relates to new and useful improvements in sledge hammers.

The invention has for an object the provision of a device of the class mentioned which i is of simple durable construction, dependable inuse and efficient in action, andwhich may be manufactured and sold at a reasonable cost.

The invention proposes detachable strik- -1o ing ends for sledge hammer heads arranged to be quickly and firmly adjusted and held in place upon a hammer head so as to be eX- changeable on the heads of various hammers which is of extreme advantage in that new 1 -5 attachments may be engaged on hammers to take the place of worn and damaged ones.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claim in which the variousnovel features of the invention are more particularly set forth. T

In the accompanying drawing forming a material part of this disclosure Fig. 1 is a side elevational View of a device constructed according to this invention.

Fig. 2 is an edge elevational view of Fig. 1.

3 is a sideelevational view of a modified form of hammer constructed according to the same invention.

Fig. 4 is a rear elevational view of Fig. 3. Fig. 5 is a fragmentary side elevational view of another modified form of hammer Q5 constructed according tothe same invention.

Fig. 6 is a fragmentary side elevational view of a portion'of a hammer constructed according to modified form.

Fig. 7 is a view similar to Fig. 2 but illuscrating a modified form thereof.

Fig. 8 is a fragmentary side elevational View of Fig. 7.

Fig. 9 is a fragmentary enlarged sectional view taken on the line 99 of Fig. 8.

The reference numeral 10 indicates generallythehead of. ahammer provided with a handle 11 secured'to the headby a spreading wedge 12 driven into the handle and spreading a portion of the handle engaged in the head. The hammer head 10 has a central 5 portion 13, a'front striking end 14 and a rear striking end 15. The front striking end 14 is of circular form in horizontal" cross section and the rear striking end 15 is substantially semi-spherical in form. v

The opposite ends of the central portion 13 are provided with dovetail tongues 16 engagin'g'in dovetail grooves formed in the front and rear striking ends 14 and 15. Set screws 17 threadedly engage'portions of the striking ends and portions of the tongues 16 for firmly and removably. holding the striking ends upon the-central portion of the. head. The set screw 17 may be substituted by a rivet or the like. 1

In Figs. 3 and 4, a modified form of hammer has been illustrated in which the rear striking end 15' is of flat and reduced form and integral with the central portion 13'. This hammer is provided with a front striking end 14 connected with the central portion 13 by a dovetail tongue 16 integral with the central portion and engaging in a dovetail groove in the striking end. A set. screw 17 threadedly engages in the head and serves 75 to hold the parts in relatively fiXedcondi tions. i InFigzfi' another modified form ofham: mer has been illustrated which is formed with a rear striking end 15" of reduced, flat and curved form. This hammer is provided with a front striking end 14 connected with a central portion 13 of the hammer head by a dovetail tongue 16*. A set screw 17 serves to hold these movable parts in fixed relations.

In themodified form illustrated in Fig. 6, a hammer striking end'14 has been 'illus- 1 trated connected with a hammer central portion 13 by a tongue 16. This tongue consists of a neck portion 18 and an enlarged rectangular portion 19 integral with one end of the neck portion. A set screw 17 threadedly engages in the striking end 14- and in a portion of the tongue 16 for holding these parts in fixed relations.

In Figs. 7 and 8, another modified form has been illustrated in which each of the striking ends is held against slidable disengagement by a plate 20 slidably mounted in the central portion of the hammer head and having a reduced latch'end 21 engaging in an aperture in the striking end of the head and urged into engaged p'ositionby a spring 23. The plate 20 is formed with an aperture 2d aligned with an opening 25 formed in the central portion of the hammer head FREDERICK sonwnionnr.

so that a tool may be engaged thru the open- 7 ing and inserted in the aperture 24 formanually forcing the plate 20 inwards against spring 23 so that the latch portion21 disengages from the striking end thereby permitting said striking end to be removed. The spring 28 consists of a central portion 23 riveted on the central portionfof the hammer head and having ends 23 turned at right angles to the-central portion 23 and directed thru cavities 26 formed in thercentral portion of thehammer head and engaged beneaththe inner ends of the plates 20. v

In operation er the device the hammers may be used in a customary manner for customary purposes. In the event that, the striking ends become worn or break or are damaged in any manner whatsover they may beremoved fromthe central portion and replaced. Such. removal is possible in the forms of the hammers illustrated in Figs. 1 to 6 inclusive by loosening the set screws 17 andthen slidably disconnecting the striking ends from the central portions ofthe heads. This slidable movement is permitted by the dovetail construction used in connecting the parts. The striking ends of the hammer shown in Figs. 7 and 8 may be removed upon manually forcing the plates 20 so that the latching ends of these plates are disengaged from the striking ends of the hammer. Then these striking endsmay be slidably disengaged from the central portionof the hammer head. i

lVhile I have shownwand described the preferred embodiment of my invention, it is to be understood that I do not limit myself to the precise construction herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claim. Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is In a sledge hammer having a central portion and striking ends thelatter being detachably connected with saidrcentral portion by tongue and groove joints, plates slidably g mounted in the central portion and formed 

